Fifteen kids stranded in a dinosaur world, and the real danger isn't the monsters, it's watching them turn on each other the moment leadership fractures. The show commits to its premise: no adults, no rescue squad, just children making impossible choices with incomplete information and paying for every mistake. It's survival without the fantasy sugar, where a talking dinosaur won't save you if the person next to you has decided you're the enemy.

Fifteen children of different ages set out on a school sailing trip and are mysteriously carried off to another world where dinosaurs still live. As they search for a way home, they meet dinosaurs that can talk, revolutionaries, pirates, a princess and primitive scientists. These unlikely allies help them get away from soldiers, bandits, dangerous dinosaurs and zealous priests. Within the group, hostility between the two oldest boys splits the children apart and sets up a scheme of betrayal, while romances form under the strain. Along the way the children learn that each of them has something to offer, and that they can only reach home by working as one. The story is a loose adaptation of Jules Verne's 1888 novel Two Years' Vacation, told as a 39-episode adventure blending drama, fantasy and science fiction.